The McGowan Government will contribute $23 million towards upgrading the last remaining single-lane section of Marmion Avenue to Yanchep.

Funding for the road duplication between Camborne Parkway in Butler to Yanchep Beach Road in Yanchep was a key election commitment to ease congestion and create jobs.

The $23 million will be provided to the City of Wanneroo, which will carry out the road upgrade subject to council approving acceptance of the funding.

Design and planning works are set to be undertaken this year, with construction set to start in 2018 and completion in 2020.

The four-lane upgrade of Marmion Avenue is part of several projects aimed at catering for the population growth in the northern suburbs.

The State Government is planning for the METRONET rail extension to Yanchep, investing $146 million for major upgrades to Wanneroo Road and recently opened the Mitchell Freeway extension to Hester Avenue.

Comments attributed to Transport Minister Rita Saffioti:

"We recognise the area is one of the fastest growing regions in Perth, and that is why we are committed to getting the access right with both road and rail.

"A McGowan Labor Government is committed to reducing congestion in our northern suburbs. We have committed to rolling out a series of measures, including the extension of the rail line to Yanchep as part of METRONET."

Comments attributed to Butler MLA John Quigley

"We are delivering a key election commitment to the northern suburbs, which have put up with congestion for too long.

"Making Marmion Avenue a dual carriageway will slash travel times from the Yanchep and Alkimos district and reduce driver frustration."